22.03.0-rc1 seems to crash and reboot occasionally on my two BT Home Hub 5A/Plusnet Hub One (HH5a) during the boot up sequence. I've filed a bug report
https://github.com/openwrt/openwrt/issues/9829
It seems to occur around the same point.
[ 15.388884] IFX DEU SHA1_HMAC initialized.
[ 15.391978] IFX DEU MD5_HMAC initialized.
[ 15.417049] NET: Registered protocol family 24
[ 15.423093] ath9k_pci_owl_loader 0000:00:0e.0: enabling device (0000 -> 0002)
[ 15.432846] ath9k_pci_owl_loader 0000:00:0e.0: fixup device configuration
[ 36.488592] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[ 36.493101] rcu: 1-...!: (1 GPs behind) idle=6d2/1/0x40000000 softirq=759/760 fqs=3
[ 36.500915] (detected by 0, t=2102 jiffies, g=-111, q=26)
[ 36.506399] Sending NMI from CPU 0 to CPUs 1:
ROM VER: 1.1.4
CFG 06
NAND
NAND Read OK
ROM VER: 1.1.4
CFG 06
NAND
NAND Read OK